Process and tool for driving and clinching nails



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0. P. BALL. 7 Process and Tool for Driving and Olinohing Nails.

No. 231,979. Patented Sept. 7,1880.

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I ATTORNEYS.

N-PETERS, PHOTO-LITHDGRAPMER WASHINGTON. uv Cx UNITED STATES PATENT()FFICE.

CHARLES P. BALL, OF DANVILLE, KENTUCKY.

PROCESS AND TOOL FOR DRIVING AND CLINCHING NAILS.

SPECIFICATION forming part of Letters Patent No. 231,979, datedSeptember 7, 1880.

(Model) To all whom it may concern Be it known that I, CHARLES P. BALL,of Danville, in the county of Boyle and State of Kentucky, have inventeda new and Improved Process and Tool for Driving and (Jlinching Nails, ofwhich the following is a specification.

The object of this invention is to drive and clinch nails at any desireddepth.

The invention consists in a driving and clinching tool and an improvedmethod of forming the nail-hole, applying the nail, and clinching it, ashereinafter described.

Figure l is a vertical side elevation of the instrument for making thenail-holes. Fig. 2 is a side elevation, partly in section, of theinstrument for applying the nail, showing also a nail in position. Fig.3 represents a side ele ration of a nail driven and clinched. Fig. 4 isa modification of the instrument for making the nail-hole.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents the instrument for makin the hole for adouble-pointed nail, said instrument being simply a slender bar of steelor other metal with its lower edge notched in the shape of a letter, A,as shown at a, so as to present two points, I) b. Said instrument ortool A is held in the socket of a handle, B, by means of the thumb-screwO. A nail-hole is made by applying this device vertically, as shown atFig. 1, and striking with a hammer on the top of the handle B, by whichmeans a hole is formed in wood or other substance, said hole having atriangular burr or point projecting upward from its bottom, as shown atc.

D represents the tool for applying the nail to the hole made by the toolA. Said tool consists of a metal shoe, D, provided with a shank, E, anda handle, F, that are set at an angle of about forty-five degrees to theshoe proper. A vertical opening, G, extends entirely through the leg ofthe shoe, and the bottom of the toe of the shoe D is provided withseveral sharp studs, (1, to hold the'tool in place.

After a hole has been made by the tool A a nail, K, is appliedthereto-4n this instance a double-pointed nail-so that its points shallstraddle the burr c, and the opening G of the tool D is then set oversaid nail K, the said tool D being pressed down, so th at its studs dshall hold in the surface of the substance through which the nail is tobe driven. The plunger H, which forms part of the tool D and is heldvertically movable in the opening G by means of the set screw I, thatenters laterally into the slot 9 in said plunger H, then resting on thehead of said nail K, is then struck with a hammer, with the effect ofdriving said nail K, and the points of said nail, passing down on eitherside of the triangular projection cin the nail-hole, are therebyinclined upward and clinched,as shown at Fig. 3.

A modification of the instrument or tool A, designed for forming holesfor the clinching of ordinary single-pointed nails, is shown in The toolD is of especial service in holding the nail in position whilebeingdriven and accurately guiding it, so that the points of the nailshall go on either side of the projection or burr c.

This apparatus and process are especially adapted for the application ofnails of either single or double points in putting on sheetmetal roofsand in all work where strength and durability are desired.

The depth at which the nail shall clinch is determined by the depth ofthe hole made by the tool A.

I am aware that it is not new in a nail-driving machine to feed thenails to the magazine by a spring-pusher driven by a punch on the end ofa springlever, or to feed by a springplunger.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. A process of applying and clinching double-pointed nails, whichconsists in forming a nail-hole partially through the stock to be unitedwith a central projection in its bottom,

and applying the nail to said hole, so that the

